CN100417921C - Pump with pneumatic motor - Google Patents
Pump with pneumatic motor Download PDFInfo
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- CN100417921C CN100417921C CNB2004100837489A CN200410083748A CN100417921C CN 100417921 C CN100417921 C CN 100417921C CN B2004100837489 A CNB2004100837489 A CN B2004100837489A CN 200410083748 A CN200410083748 A CN 200410083748A CN 100417921 C CN100417921 C CN 100417921C
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- piston
- plunger
- motor
- fluid
- dispensing piston
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- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
A pump having a compressed-air-operated reciprocating motor for reciprocating a pump plunger through forward and return strokes. The motor comprises a motor cylinder and a motor piston operable in the cylinder and itself acting as a valve for effecting its return through each return stroke. A fluid dispenser is driven by the plunger between a charge position for charging a dispensing chamber with fluid and a discharge position for discharging fluid.
Description
Technical field
The present invention relates to a kind of pneumatic (the pressurized air operation) back and forth motor, especially a kind of pumping installations that includes motor, this pumping installations is used for pumping fluid.
Background technology
In one embodiment, the present invention relates to a kind of pneumatic liquid pump, is the liquid pump of the disclosed the sort of type of the U.S. Pat 5924602 (on July 20th, 1999 bulletin) of " pneumatic liquid pump (Airoperated liquid pump) " as title.In another kind of embodiment kind, the title that the present invention relates on July 14th, 1 bulletin is the disclosed the sort of grease compressor of the U.S. Pat 5779105 of " air-operated grease compressor (air operated grease gun) ", this invention is in patent ' although the commercial version of the grease compressor that discloses in 105 improves. satisfactory basically at liquid pump disclosed in these patents and grease compressor, but they still exist fault and short problem of life-span, and need will keep in repair soon.And there is jammed tendency sometimes in the piston of this motor.
Summary of the invention
Several purposes and feature according to the present invention provide a kind of air driven pump, and promptly a kind of pump of compressed air-driven is used for pumping fluid; This pump that provides has pneumatic reciprocal motor, and this motor is used for this pump, and (under situation about not needing repairing) has long serviceable life; This pump that is provided has reciprocating piston pump, and this piston can prevent to be stuck; And this pump that provides has lighter weight relatively, and noise is lower in the course of work, and manufacturing cost economy.
Generally, of the present inventionly be used to distribute a kind of pump of fluid to comprise: a pneumatic reciprocal motor, a divider, and by the reciprocal plunger of this motor driven.This motor comprises a motor cylinder, and this motor cylinder has a head end and bar portion end.But motor piston to-and-fro movement in cylinder, this motor piston has front side and rear side.This motor piston can be through terminal and return towards head end through a backstroke and to move back and forth towards the bar portion of this cylinder in the forward stroke, and be subjected to bias voltage and return by a backstroke.This plunger extends through the terminal and to-and-fro movement under the effect of this motor piston of bar portion of this cylinder forward from this motor piston.This cylinder has the air intake that pressurized air enters that is used for of the rear side that is positioned at this motor piston, is used to drive it and overcomes and return bias voltage and forward through a forward stroke, and at the air out of the front side of this motor piston, be used for deaeration.This motor piston has the through channel that extends to its rear side from its front side.There is a valve can be in this motor piston blocking the position of this through channel with respect to this motor piston and open between the position of this through channel and move.This cylinder and motor piston have auxiliary channel, are used for from the rear side discharge pressure air of this motor piston so that make this valve move to the position that its through channel is opened when the forward stroke of this motor piston is finished.This motor piston has played the effect of a valve and opened this auxiliary channel when the forward stroke of this motor piston is finished.This divider comprises a dispensed chambers, the dispensing piston in this dispensed chambers, and this dispensing piston is supported so that the to-and-fro movement along with the to-and-fro movement of this plunger by this plunger.This dispensing piston can also make between the drain position that fluid discharges from this dispensed chambers with respect to this plunger motion in a filled position and that is used to dispensed chambers to fill fluid.
On the other hand, automatic pressure drive fluid divider of the present invention comprises a dispensed chambers, reciprocating actuation plunger, and this plunger has a tip.Have a dispensing piston in this dispensed chambers, this piston is by the supporting of this plunger, be used for along with the to-and-fro movement of this plunger and to-and-fro movement.This dispensing piston has at least one opening of crossing that passes this dispensing piston.This dispensing piston can also make between the drain position that fluid discharges from this dispensed chambers with respect to this plunger motion in a filled position and that is used to dispensed chambers to fill fluid.There is a seal to be fixed on this plunger in this dispensed chambers, can to-and-fro movement along with the to-and-fro movement of this plunger.The sealing part is arranged to when this dispensing piston is in it and fills the fluid position that the sealing part separates with this dispensing piston and fluid can flow through this and crosses opening.When this dispensing piston was in its drain position, itself and sealing part meshed and prevent that fluid from flowing through this and crossing opening.On this tip a nut can be installed, this nut has smooth outside surface, is used to support this dispensing piston and a head.The tip of this plunger has external thread, and this nut has complementary internal thread so that be fixed on this tip.
Other purpose of the present invention and feature will progressively be known and progressively point out in the back.
Description of drawings
Fig. 1 is the side view that adopts grease compressor of the present invention;
Fig. 2 is the end-view of the grease compressor when the left side of Fig. 1 is seen, has wherein omitted flexible pipe;
The cut-open view of being done along the cross section 3-3 among Fig. 2 during Fig. 3;
Fig. 4 is the partial enlarged drawing of Fig. 3;
Fig. 5 is and Fig. 4 corresponding view the shift position of having expressed parts;
Fig. 6 is the skeleton view of the motor piston of grease compressor;
Fig. 7 is the side view of motor piston;
Fig. 8 is the cross-sectional figure of the motor piston done along the cross section 8-8 among Fig. 7;
Fig. 9 is the left side view of Fig. 7;
Figure 10 is the sectional side elevation of the piston done along the cross section 10-10 among Fig. 9;
Figure 11 is the right side view of Fig. 7 and 11;
Figure 12 is the partial enlarged view of Fig. 5;
Figure 13 is the cut-open view of the trigger operation valve of grease compressor;
Figure 14 is the left side view of Figure 13;
Figure 15 is the skeleton view that adopts pump of the present invention, flexible pipe wherein is installed is used for distributing fluids;
Figure 16 is the skeleton view of the pump among Figure 15, wherein has a dispensing tap pipe (spigot tube)
Figure 17 is the sectional side elevation of pump shown in Figure 16, expresses a dispensing piston and is in filled position;
Figure 18 is the amplification view of this pump, and what still express is that this dispensing piston is in filled position;
Figure 19 is the end-view of this dispensing piston;
Figure 20 is the cut-open view of being done along the cross section 20-20 among Figure 19;
Figure 21 is the end-view of a seal;
Figure 22 is the cut-open view of being done along the cross section 22-22 among Figure 21;
Identical label symbol is represented identical parts in all views and accompanying drawing
Embodiment
Referring now to accompanying drawing,, especially referring to Fig. 1, shown in it is a grease compressor of the present invention, its whole mark 1 that adopts refers to, and it comprises a motor/pump unit, and it totally adopts mark 3 expressions, it is in the upper end of an annular knurl pistol grip 5, and stretches out forward from this handle.This motor/pump unit comprises the to-and-fro movement motor 7 of pneumatic operation (pressure air operation), be used to make plunger 9 (referring to Fig. 3-5) front-rear reciprocation movement of a pump 11, thereby be used for from being connected the consistent lubricant supply container 13 pumping consistent lubricants on this pump 11, this consistent lubricant container extends downwards and from it to this handle tilt.Be used for operating this motor 7 and make plunger 9 reciprocating pressurized air passage 15 by this handle 5 under the control of valve 17 flow to this motor, this valve 17 can be handled by a trigger.
This motor comprises a cylinder 21, and this cylinder stretches out forward from the upper end of this pistol grip 5, and the axis of this cylinder adopts A-A to represent in Fig. 3-5.Shown in Fig. 3-5, the cylinder block 21b of this cylinder and head end 23 (its end backward) are integrated, preferably adopt suitable material for example the ANSI380 aluminium die cast alloy be made for parts.Bar portion end (front end) of this cylinder is an installation elements, and this will be described in detail subsequently, and its part by the body 27 of pump 11 constitutes.
The preferred piston 29 that adopts suitable plastics (for example polyamide) to make can to-and-fro movement in this cylinder 21.This piston 29 has constituted motor piston, and has a front side 31 and rear side 33 (referring to Fig. 6-11).It can be through a forward stroke from reciprocating to extended position shown in Figure 5 near the retracted position of the head end 23 of this cylinder 21 towards the bar portion end 25 of this cylinder shown in Fig. 3 and 4, and towards this head end 23 it is returned through a backstroke under the bias voltage that is subjected to spring 35.This spring 35 is the coil compression spring, in this cylinder, in axial direction extend, and with its be labeled as 37 front end seat adorn on the bar portion end 25 of this cylinder and react on this piston so as in this cylinder with its bias voltage backward.This pump plunger 9 is made of the piston rod of this motor, this plunger or piston rod 9 extend through axial hole 39 the bar portion end 25 of this cylinder 21 from this piston forward, comprise axial projection 41, this projection extends back from this bar portion end 25, and by an elongated extension 43 forward, this extension constitutes the pump line of this pump housing 27.One seal 45 is arranged on the rear end that is positioned at this projection 41 on this plunger.The front end of this spring 35 surrounds this projection 41.Bar portion end 25 rear portions by this pump housing 27 of this cylinder 21 constitute, and have the annular wall 47 that extends back, and this annular wall extends in the annular inside groove 49 in the front end of this cylinder 21.This annular wall 47 is fixed in this ring groove 49 by for example screw 51.
In the embodiment shown in Fig. 3, the pump housing 27 has a projection 53 of extending downwards, is formed with an internal thread cap spare 55 in its lower end, is used to seal the upper end of this consistent lubricant supply container 13 and is used for this container is fixed on this grease compressor 1.This container 13 is a kind of cylinder formula consistent lubricant containers, and this container comprises an elongated cylindrical receiver, has end cap cover 57.In this receiver, there is a driven member 61 (follower) to be positioned at the upper end of this follower lever 59, be used for forcing the consistent lubricant of this receiver upwards to supply with and it passes hole 63 in this cap spare 55 and the consistent lubricant passage 65 in this projection 53 and is discharged in the hole 39.This follower lever 59 can in this cap 57, slide and have one handle 67 be used for overcoming this receiver spring 69 biasing force and it is pulled outwardly, and this handle can rotate so that it is locked in the position of stretching out fully by common means.Be mounted with in this receiver consistent lubricant (this driven member 61 by follower lever 59 overcome this spring 69 biasing force and fully the withdrawal) and by a plastic cap seal its upper end.Along with the dismounting of this plastic cap, the upper end of this receiver just is screwed on the cap spare 55 and this follower lever 59 and driven member 61 are released and upwards promote consistent lubricant in this receiver under the bias voltage of spring 69.This cap spare 55 is provided with an air valve 71 (referring to Fig. 1 and 2).
In one embodiment, passage 15 comprises passage 73 and 75, and this passage 73 extends to valve 17 from the end of this handle 5, and passage 75 extends to cylinder 21 from this valve 17, this path formation one is used for the inlet of cylinder, is used for from that the behind of compressed air delivery to this piston 29.Pneumatic hose 77 (for example is generally the air hose in the shop, referring to Fig. 1) linking to each other in the lower end of this handle 5 is used for giving passage 73 with compressed air delivery, thereby then under the manipulation of trigger 19 open valve 17 so that be transported to the air intake 75 of cylinder together with passage 73 and 75.This shown cylinder 21 has the air out 79 of the front side that is positioned at piston 29, is used to discharge air.It can have more than one.In another embodiment shown in Figure 180, air out 79 is equipped with an exhaust box, is used for restriction and flows and reduce noise.This exhaust box adopt suitable material for example sintered bronze make.
Pump line 43 has an outer end that enlarges slightly or end 81, accommodates a pipe fitting 83 in this end 81, and a retaining valve 85 is arranged in this pipe fitting, and this retaining valve is sealed this pump line hole 39 by spring 87 bias voltages.Along with motor piston 29 is in the retracted position (see figure 4), this pump plunger 9 (piston rod) is positioned at after this consistent lubricant passage 65.This structure makes and is occupied by consistent lubricant in this passage 65 and the hole 39 that when pump plunger 9 carries out forward stroke in this hole 39 (when advance in the left side in Fig. 4), a consistent lubricant is penetrated pipe fitting 83, and this retaining valve 85 is opened so that carry.Lubricant transmits flexible pipe 89 and can be connected on this pipe fitting 83.
At an embodiment, aforementioned auxiliary channel 95 comprises that an inside groove 105 and that is arranged in this cylinder 21 is arranged in the water jacket 107 of this motor piston 29.This inside groove 105 is ring grooves that all extend around the inside of this cylinder 21, and with the head end 23 of this cylinder 21 at a distance of a distance that limits the forward stroke of this piston 29.Perhaps, this inside groove 105 can be made of some independent arcuate grooves, and these deep-slotted chip breakers can be arranged around the internal interval at this cylinder 21 along circumferencial direction, perhaps can be single grooves, and this single groove tightly extends around the part of whole circumference.This groove 107 is the ring grooves that whole periphery around this piston 29 extends, at the front sealing part 109 of close its front end on this piston with between the rear seal of the close its rear end on this piston, this front sealing part and rear seal are used for this piston slipper seal at this cylinder 21.Each seal 109,111 comprises the conduit section ring 113 (referring to Figure 10) of a bending, and this bending conduit section ring 113 is sat in the circumferential groove 115,117 that is contained in this piston 29, has an elasticity (rubber) 119 rings in this ring 113.This ring 113 (this ring seals up the inner periphery of this cylinder 21) has a rib shape part 121.
Still referring to Figure 10, the valve 93 of a preferred embodiment has valve rod 123, and this valve rod can slide in overall labeling is 125 hole, and vertically extend on the axis A-A of this cylinder 21 (and piston 29) along this motor piston 29 in this hole.Have head 127 on this valve rod 123, thereby this head is closed this perforation path 91 near the rear end of this valve rod and with these valve seat 99 engagements, is the rear end that is closed in three passages 97 in the valve seat 99 specifically.This head 127 comprises that one is arranged on the cyclic spring parts in the groove 129, and these parts are near the rear end 123e of this valve rod.This hole 125 has a fore-end 131 and a rear end part 133, and this fore-end forms and constitutes an assistant cylinder.The front end of this valve rod 123 forms a piston 135 (being referred to as auxiliary piston), this auxiliary piston 135 sealably slides in the assistant cylinder 131 in this motor piston 29, and this auxiliary piston 135 has the seal 137 in the groove 139 that is fixed in this piston.Path 103 comprises a ramp way 141, and the groove 107 of this ramp way 141 from motor piston 29 extends to the assistant cylinder 131 on the front side of this auxiliary piston 135.
Coil compression motor piston return spring 35 with its rear end (at figure, its right-hand member shown in 4,5 and 10) by act on the front end of this motor piston 29 by the spring base 143 that can constitute on the front surface of this motor piston 29 along the disk that all directions are slided.This piston rod 9 (pump plunger) extends forward from this disk, and has the rear end 145 with reduced, and this rear end is contained in the center pit of this disk.This structure has avoided this piston rod 9 (pump plunger) to block.
The detailed structure of this compressed air inlet valve 17 is not vital, as long as and it points out its best and Fig. 4,5, like that just enough shown in 13 and 14, promptly, it comprises a valve seat 147 and a valve member assembly 151 in the recess 149 in handle 5, this recess 149 is supplied with by the passage in handle 73 pressurized air, the off-position that this valve member assembly 151 is blocked between with passage 75 and passage 73 by spring 153 bias voltages, and can when pulling trigger 19, move to an open site so that pressurized air is sent to the rear end of this motor cylinder 21 through passage 15.This trigger can rotate around 155 pivots of the pivoting point on the handle 5.
The course of work is as follows:
When pulling trigger 19, and hold it in pulling back state, pressurized air is transported to the rear side 33 of this motor piston 29 through passage 73, this trigger operation valve 17 and passage 75 from business flexible pipe (shop hose) 77.This motor piston 29 is carried out comparatively faster to-and-fro movement at once circularly, each circulation all comprise motor piston 29 from shown in Fig. 4 (Fig. 3) near the retracted position of the head end 23 of this cylinder 21 to the forward stroke of progressive position shown in Figure 5 and the backstroke that turns back to the retracted position shown in the figure.Valve 93 in this motor piston cuts out (will be apparent from below specifically how cutting out) so that block perforation path 91 (all three through channel 97) in the motor piston 29 when each forward stroke, thereby prevents to overflow by path 91 and carry out forward stroke at the pressurized air at rear side 33 places of this motor piston.When carrying out this forward stroke motion, this motor piston compression spring 35 overcomes the power that this spring is biased in this motor piston 29 backward thus.This motor cavity at 31 places, front side of motor piston is exitted by one or more vent holes 79 when carrying out the forward stroke of motor piston 29 at every turn.Owing to this feather valve head 127 makes this perforation path 91 (three passages 97) be plugged with being bonded with each other of valve seat 99 (seeing Fig. 4 and 10).
Each of motor piston 29 returned (backward) stroke and arrived the recess 105 in the cylinders 21 along with backward motor piston seal 111 and begin, shown in Fig. 5 and 12, sealing part 111 along with motor piston 29 proal processes in, make pressurized air locate from flowing at the assistant cylinder 131 (it can be referred to as the valve cylinder) at the place, front side of auxiliary piston 135 (being valve piston) through auxiliary channel 95 at the chamber of the rear side 33 of motor piston 29.This valve that pressurized air flows to assistant cylinder 131 drives the recess 107 that flow arrives in the motor piston 29 through the recess in the cylinder 21 105, shown in the arrow among Figure 12, and because this valve seat 99 is left in head 127 motions of this valve 93, through the chamber of path 141 (Figure 10) arrival, cause valve 93 to move rearwards to the open site of unlatching path 91 shown in Figure 5 (passage 97) with respect to motor piston 29 from recess 107 in the front side of auxiliary piston 135 (being valve piston).Be unlocked owing to connect path 91, be discharged away in the chamber that the front side 31 in this motor piston 29 that escapes into cylinder 21 in the chamber of the rear side 33 of this motor piston 29 of air from cylinder 21 goes out and through one or more vent holes 79.The pressure at the pressure at this rear side 33 places of motor piston 29 and rear side place thus about equally and motor piston return spring 35 play a major role and promote this motor piston backward through a backstroke.
When motor piston 29 is returned, be loaded with valve 93 on it, the rear end 123e of this valve 93 and 23 engagements of the head end of cylinder 21 also make motion stop (temporarily).This motor piston 29 continues it and (returns) motion backward after of short duration interval, and slide rearwardly to valve seat 99 and valve head 127 position engaged places with respect to captive valve 93 at present, and guarantees the forward stroke of this motor piston thus.By making 123e to the back-end and a mat that constitutes by a resilient material (for example rubber) disk of this valve 93 carry out the noise reduction engagement and can reduce noise level significantly, this mat is installed in the recess 159 in the head end 23 of this cylinder, shown in Figure 4 and 5.
When motor piston 29 is carried out each forward stroke, travel forward so that a consistent lubricant is sent to pipe fitting 83 (and afterwards by a flexible pipe) by a pressure stroke that intersects with this pump intake 65 as the piston rod 9 of the plunger of pump 11, retaining valve 85 is opened so that transmit.When each backstroke, pump 1 is filled again goes up consistent lubricant.
What indicate especially is that the body of this motor piston 29 can manufacture a kind of injection molding plastic components (single-piece part), and its weight is lighter relatively, and this helps conveniently to hold rifle 1.This structure also can be used lighter return spring relatively, so that this grease compressor can carry out work with relatively low air pressure (for example 40p.s.i.).Another noticeable characteristics are can prevent owing to attempting the back pressure that lubricated bearing that is plugged or consistent lubricant accessory cause.
An alternative embodiment of the invention shown in Figure 15-22 is that a kind of general reference numeral is 160 pump, is used to distribute a kind of fluid.This pump is particularly suited for distributing the fluid of a kind of low twist or middle twist from a container 163.The example of this fluid is mineral or synthetic motor lubricating oil, solvent, toluene, freeze-point depressant, windscreen liquid and transmission or actuating fluid.Shown in Figure 15 is adopts first kind of application of this pump 160, and wherein pump is arranged in the top of container 163, and the quick dip-tube 165 that is used for receiving fluid extends downwardly into this container from this pump.In one embodiment, this dip-tube 165 has about 36 inches length, and this length is enough to arrive the bottom of multiple lubricant bucket.Being understandable that this dip-tube can have any length, perhaps can be non-rigid, so that this pump can be arranged in away from the local of this container or can be in any position with respect to this container.Opening part at this container 163 is provided with a cooperage spigot 167, is used for that this dip-tube 165 remained on vertical direction and prevents dirt or other pollutant enters this container around this dip-tube.This pump 160 has an outlet 169 that links to each other with a distribution flexible pipe 171, and this distribution flexible pipe 171 is installed in and is used on the spool 173 fluid is sent to a position far away.The second kind of application that is to use this pump shown in Figure 16, its middle outlet 169 links to each other so that give a portable container (not shown) with FLUID TRANSPORTATION in a rigidity faucet 175.
Referring to Figure 17 and 18, this pump 160 comprises this pneumatic reciprocal motor 7, and this motor is used for a grease compressor 1.With previously described the same, once more will be no longer the component parts and the operation of this motor be described.This pump comprises a divider, adopts mark 177 expressions, and this divider has a housing 179, and this housing all is closed this cylinder 21 and cylindrical dispensed chambers 181.Separate by the inwall 183 with the plunger hole 185 that passes wherein the inside of the inside of this cylinder 21 and this dispensed chambers 181.This plunger 9 enters in this dispensed chambers to extend through this plunger hole 185 in the mode that is slidingly matched.
Be provided with a gas access pipe fitting 187 on this housing 179, this housing 179 is connected with the head end 23 of this cylinder 21.Shown pipe fitting has internal thread and supplies with the flexible pipe (not shown) so that receive complementary external screw thread joint and the air lead to this housing 179, so that to cylinder 21 supply pressure air.Can also provide a kind of independently manual control (not shown) to be used to control this pressure air and flow to this cylinder 21 by this supply flexible pipe.
One fluid is fed into mouthful pipe fitting 189 and has internal thread, is used to receive the complementary external screw thread end of dip-tube 165.Fluid is directed into this dispensed chambers 181 by this supply inlet pipe fitting 189 and passage 191.This pipe fitting 187 and 189 only is some examples of inlet, is used for supply pressure gas and fluid so that the pump running.Provide the inlet and the method for gas can adopting other to be used to without departing from the scope of the invention.
A retaining valve 193 (Figure 17) is provided in dip-tube 165, has been used to prevent that fluid from flowing backwards, made fluid column in this dip-tube can after pump has been finished a stroke, not descend and turn back in the container 163.In the present embodiment, this retaining valve 193 is a ball valve, be arranged in this dip-tube the bottom near.When fluid entered in this dip-tube from this container, this fluid made this spheroid 195 break away from this its valve seat 197 and supplies with inlet pipe fitting 189 and passage 191 by this fluid continuously, enters in this dispensed chambers 181.This ball valve comprises with retainer 199, so as with spheroid 195 remain on this valve seat 197 near.This valve can be in other position or have other form, only otherwise depart from the scope of the present invention.
Faucet 175 links to each other with this dispensed chambers by a joint 201, and this joint connects so that be connected with this dispensed chambers 181 by the sidewall thread of this housing 179.A ventilation unit 203 is arranged and with valve 205, this valve is selectively by operation opening and closing with artificial handle 207 at the end relatively of this faucet.
Be labeled as 209 dispensing piston and be labeled as 211 fitted seal plate and be bearing on this plunger 9, as shown in figure 18.This dispensing piston 209 is mounted to and can slides with respect to this plunger 9, and seal pad 211 is mounted to the position fixing with respect to this plunger.
Importantly, the far-end of this plunger 9 has external thread tip 213.Many systems of prior art all have a tip and an internal thread with recess, and this causes materials with smaller thickness and therefore is easy to fracture.Of the present invention most advanced and sophisticated 213 is solid construction, has produced a kind of improved intensity.External thread is arranged on this tip.Nut 215 with complementary internal thread is installed on this tip 213.Sealing plate 211 (Figure 21 and 22) has a center pit 217, and this center pit can be enclosed within on the tip of this plunger.When this nut 215 was screwed on this tip 213, this nut contacted and abuts against on the sealing plate with sealing plate 211, thus seal pad was fixed between the shoulder 219 of the end of this nut and plunger 9.Sealing plate 211 is fixed on the fixed position on this plunger, makes that the sealing plate can be along with this plunger moves back and forth in this dispensed chambers.
The cover of this nut 215 (shank) has smooth cylindrical outer surface 221 and enlarged head portion 223.This dispensing piston 209 (Figure 19 and 20) has center pit 225, its size can with a kind of be slidingly matched to be sleeved on make this dispensing piston can be freely on this nut 215, slide along the longitudinal on this outside surface 221.This dispensing piston 209 is limited on this nut 215 so that can slide with charge position (Figure 18) with between with drain position (Figure 17) by vertically relative this plunger 9, in this charge position, this dispensing piston is separated with sealing plate 211 and close this enlarged head portion 223, and at this drain position, this dispensing piston near the sealing plate and with this amplifying head part from.Three elliptic flow through holes 227 be distributed in a spiral manner this center pit 225 around.
This dispensing piston 209 has the structure of a simple and inexpensive, comprises flat circular gasket 229, annulus seat 231 and an outer seal ring 233 (Figure 18-20).Pad 229 and annular seating 231 are preferred by the formation of metal stamping technology, and are fixed together by spot welding with facing each other.This annular seating 231 has a center pit, and the size of this center pit is identical with the pad center pit, and it is fixing to align with it, with the center pit 225 that constitutes this dispensing piston.This annular seating also has three openings, these three opening spiral way be arranged in its center pit around, the shape in these three holes and position are fixed with respect to the opening of this pad, thereby constitute this opening 227.This annular seating 231 is carried out punching press so that be formed on its peripheral annular shoulder 235 and annular flange flange 237.This shoulder and flange form a ring groove 229 with the periphery of this pad, and this ring groove extends at the periphery of this dispensing piston 209 fully.Receive sealing rings 233 in this ring groove 239, and its size is made and is made the sealing ring that is bearing in this ring groove to slide in the mode of sealed engagement on the inside surface of this dispensed chambers 181.
When folder sealing plate 211 was assembled on this plunger 9, this center pit 217 was passed at the tip 213 of this plunger.This nut 215 holds the center pit 225 that passes this dispensing piston 209 and rotates so that make the internal thread of this nut mesh in this most advanced and sophisticated external thread.This nut 215 is installed in sealing plate 211 on this plunger 9 in place securely, and is oriented shown in Figure 17 and 18.So also with this dispensing piston 209 on the plunger 9 so that make dispensing piston between the amplification head 223 of this nut and seal pad 211, slide.
When work, the fluid that band distributes for example lubricant flows to divider 177 by dip-tube 165.This fluid can be given divider or can offer this divider by alternate manner (for example those modes of being discussed) when describing the working condition of grease compressor 1 from an external source of fluid pumping by dip-tube.Right side R when the fluid of being carried passes this feed path 191 and enter seeing in this dispensed chambers 181 from Figure 18, and arrive the right side of dispensing piston 209.This pressure air source is connected on this pressure air inlet pipe fitting 187.This divider prepares to carry out work subsequently.The running of this air motor 7 makes this plunger 8 by these plunger hole 185 to-and-fro movements.This plunger 9 is withdrawn by this plunger hole when air-motor piston 52 moves to its retracted position in cylinder 54, and advances when this piston 52 advances by this cylinder 54 through this plunger hole.
When this plunger 9 moved to its retracted position, this plunger moved towards the right side in Figure 17 and 18.This motion causes this plunger also seal pad 211 and dispensing piston 209 to be spurred to the right.Be fixed on sealing plate 211 on this plunger 9 and nut 215 along with plunger moves.But, be mounted to can be in the slide outside of this nut 215 for this dispensing piston 209.When this plunger 9 moved right, this dispensing piston this plunger 9 relatively slided into its charge position left, as shown in figure 18.Can see that along with this dispensing piston is arranged in its charge position with respect to this plunger 9, sealing plate 211 separates one in this dispensing piston and exposes this opening 227.Make any fluid can flow through the periphery of sealing plate like this, pass the flow orifice 227 of this dispensing piston 209, and enter the left side L (from Figure 18) of this dispensed chambers on the left side of this dispensing piston at the right side of dispensed chambers R.At this left side L, fluid is in the state that preparation distributes, and this dispensed chambers 181 is filled.This dispensing piston 209 stops relative this plunger when engaging with this head 223 slides, and it moves right along this plunger subsequently.
When plunger 9 when its progressive position advances, it is seen towards the left side from Figure 17 and 18 and moves.When plunger 9 during, be fixed on sealing plate 211 on this plunger also to left movement to left movement.But, this dispensing piston slides to sealing plate 211 through this nut outside surface 221 now and occupies its drain position up to its relative plunger, and in this position, it is resisted against on the O shape ring 245 of sealing part.The sealing part is closed the opening 227 of this dispensing piston.When this piston 9 continues to left side shown in Figure 17 and 18,209 pairs of any fluids at L place, the left side of this dispensed chambers of this dispensing piston push (or propelling fluid), make it pass this outlet 169, this fluid can carry out selectivity and distribute in this exit.The motion left of this dispensing piston has also produced a kind of vacuum pressure, the right side R that this vacuum pressure was just taken out fluid this dip-tube 165 and added to this dispensed chambers 181 in this dispensing piston motion.
According to top described, can see that several purposes of the present invention all and other the favourable effect that realizes and obtain.
Can carry out various changes to said structure without departing from the scope of the invention, all theme and themes shown in the accompanying drawing that comprise in the foregoing description should be interpreted as its objective is for elaboration and not make qualification.
When to introducing elements more of the present invention or its preferred embodiment being, article and " described " these statements its objective is that in order to represent one or more elements are arranged.Term " comprises " and is expressed as openly that and expression can also comprise other element, rather than only comprises those listed elements.
Claims (10)
1. a pump that is used for distributing fluids comprises: a pneumatic reciprocal motor, and a divider, and by the reciprocal plunger of described motor driven;
Wherein said motor comprises:
One motor cylinder, described motor cylinder have a head end and bar portion end;
But motor piston to-and-fro movement in cylinder, described motor piston has front side and rear side, described motor piston can be through terminal and return towards head end through a backstroke and to move back and forth towards the bar portion of described cylinder in the forward stroke, and be subjected to bias voltage and return by a backstroke;
Described plunger extends through the terminal and to-and-fro movement under the effect of described motor piston of bar portion of described cylinder forward from described motor piston, and described plunger has a tip;
Described cylinder has the air intake that pressurized air enters that is used for of the rear side that is positioned at described motor piston, is used to drive it and overcomes and return bias voltage and forward through a forward stroke, and at the air out of the front side of described motor piston, be used to discharge air;
Described motor piston has the through channel that extends to its rear side from its front side;
There is a valve can be in described motor piston blocking the position of described through channel with respect to described motor piston and open between the position of described through channel and move;
Described cylinder and motor piston have auxiliary channel, be used for from the rear side discharge pressure air of described motor piston so that make described valve move to the position that its through channel is opened when the forward stroke of described motor piston is finished, described motor piston has played the effect of a valve and opened described auxiliary channel when the forward stroke of described motor piston is finished;
And wherein said divider comprises:
One dispensed chambers,
Dispensing piston in described dispensed chambers, described dispensing piston is supported so that the to-and-fro movement along with the to-and-fro movement of described plunger by described plunger, described dispensing piston has at least one opening that passes this dispensing piston, and described dispensing piston can also make between the drain position that fluid discharges from described dispensed chambers with respect to described plunger motion in a filled position and that is used to dispensed chambers to fill fluid;
Seal in described dispensed chambers, described seal is fixed on the described plunger so that the to-and-fro movement along with the to-and-fro movement of described plunger, described seal arrangement becomes like this, promptly described seal separates with described dispensing piston and fluid can flow through described at least one opening when described dispensing piston is positioned at its filled position, and when described dispensing piston was positioned at its drain position, described dispensing piston engaged with described seal and prevents that fluid from flowing through described at least one opening; And
One is installed in the nut on the tip of described plunger, and described nut has the outside surface that is used to support described dispensing piston;
Wherein, the tip of described plunger has external thread and described nut has complementary internal thread so that be fixed on the described tip.
2. pump as claimed in claim 1, it also comprises: with described dispensed chambers and the separated inwall of described cylinder, pass the hole of described inwall, and this plunger extends through described hole from this piston and enters in this dispensed chambers.
3. pump as claimed in claim 1, wherein, the outside surface of described nut is that smooth and described nut also has a head.
4. pump as claimed in claim 3, wherein, described tip has solid basically structure and does not have inner cavity chamber.
5. pump as claimed in claim 3, wherein, described dispensing piston also comprises a center pit, is used for admitting described nut in a kind of mode that is slidingly matched, making described dispensing piston be mounted to can slide along the smooth outer surface of described nut.
6. pump as claimed in claim 4, wherein, described dispensing piston is limited so that move between the head of this nut and described seal along this plunger.
7. automatic pressure drive fluid divider comprises:
One dispensed chambers;
One reciprocating actuation plunger, described plunger has a tip;
In described dispensed chambers, has a dispensing piston, described piston is supported by described plunger, be used for to-and-fro movement along with the to-and-fro movement of described plunger, described dispensing piston has at least one opening of crossing that passes described dispensing piston, and described dispensing piston can also make between the drain position that fluid discharges from described dispensed chambers with respect to described plunger motion in a filled position and that is used to dispensed chambers to fill fluid;
There is a seal to be fixed on the described plunger in the described dispensed chambers, can to-and-fro movement along with the to-and-fro movement of described plunger, described seal arrangement becomes when described dispensing piston is in it and fills the fluid position described seal to separate with described dispensing piston and fluid can flow through the described opening of crossing, when described dispensing piston is in its drain position, itself and described seal engages and prevent that fluid from flowing through the described opening of crossing;
On described tip a nut can be installed, described nut has a smooth outer surface and a head that is used to support dispensing piston;
Wherein, the tip of described plunger has external thread, and described nut has complementary internal thread so that be fixed on the described tip.
8. fluid distributor as claimed in claim 7, wherein, described tip has solid basically structure and does not have inner cavity chamber.
9. fluid distributor as claimed in claim 7, wherein, described dispensing piston also comprises a center pit, is used for admitting described nut in a kind of mode that is slidingly matched, making described dispensing piston be mounted to can slide along the smooth outer surface of described nut.
10. fluid distributor as claimed in claim 7, wherein, described dispensing piston is limited so that move between the head of this nut and described seal along this plunger.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/685,056 US6923348B2 (en) | 2002-03-01 | 2003-10-14 | Pump with pneumatic motor |
| US10/685,056 | 2003-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1648449A CN1648449A (en) | 2005-08-03 |
| CN100417921C true CN100417921C (en) | 2008-09-10 |
Family
ID=34886427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100837489A Active CN100417921C (en) | 2003-10-14 | 2004-10-14 | Pump with pneumatic motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100417921C (en) |
| TW (1) | TWI298311B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2135098Y (en) * | 1992-06-17 | 1993-06-02 | 屈元财 | High-efficient pneumatic grease gun |
| US5341723A (en) * | 1993-04-20 | 1994-08-30 | Michael Hung | Reciprocating pneumatic motor for hydraulics |
| US5779105A (en) * | 1997-08-11 | 1998-07-14 | Mcneil (Ohio) Corporation | Air operated grease gun |
| US5924602A (en) * | 1997-08-11 | 1999-07-20 | Mcneil (Ohio) Corporation | Air operated liquid pump |
| CN1361374A (en) * | 2000-12-29 | 2002-07-31 | 郭宝权 | Hydraulically driven high-pressure dry oil-lubricated pump |
| US6494347B1 (en) * | 2001-11-05 | 2002-12-17 | Kuo-Chung Yeh | Grease gun having automatic continuous feeding device |
| US20030164387A1 (en) * | 2002-03-01 | 2003-09-04 | Lincoln Industrial Corporation | Pneumatic reciprocating motor and grease gun incorporating same |
-
2004
- 2004-10-12 TW TW93130866A patent/TWI298311B/en not_active IP Right Cessation
- 2004-10-14 CN CNB2004100837489A patent/CN100417921C/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2135098Y (en) * | 1992-06-17 | 1993-06-02 | 屈元财 | High-efficient pneumatic grease gun |
| US5341723A (en) * | 1993-04-20 | 1994-08-30 | Michael Hung | Reciprocating pneumatic motor for hydraulics |
| US5779105A (en) * | 1997-08-11 | 1998-07-14 | Mcneil (Ohio) Corporation | Air operated grease gun |
| US5924602A (en) * | 1997-08-11 | 1999-07-20 | Mcneil (Ohio) Corporation | Air operated liquid pump |
| CN1361374A (en) * | 2000-12-29 | 2002-07-31 | 郭宝权 | Hydraulically driven high-pressure dry oil-lubricated pump |
| US6494347B1 (en) * | 2001-11-05 | 2002-12-17 | Kuo-Chung Yeh | Grease gun having automatic continuous feeding device |
| US20030164387A1 (en) * | 2002-03-01 | 2003-09-04 | Lincoln Industrial Corporation | Pneumatic reciprocating motor and grease gun incorporating same |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200523202A (en) | 2005-07-16 |
| TWI298311B (en) | 2008-07-01 |
| CN1648449A (en) | 2005-08-03 |
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